Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations, Version 2 (NSIDC-0081)
Data set:
NSIDC-0081
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This is the most recent version of these data.
Version Summary
Version update reflects the conversion of the data set from binary to netCDF.

Overview

This data set provides a Near-Real-Time (NRT) map of sea ice concentrations for both the Northern and Southern Hemispheres.
Data Contributor(s):
Meier, W. N., J. S. Stewart, H. Wilcox, M. A. Hardman, and D. J. Scott.
Parameter(s):
SEA ICE CONCENTRATION
Platform(s):
DMSP 5D-3/F16, DMSP 5D-3/F17, DMSP 5D-3/F18
Sensor(s):
SSMIS
Data Format(s):
PNG, NetCDF
Temporal Coverage:
1 November 2021 to present
Temporal Resolution:
1 day
Spatial Resolution:
25 km
25 km
Spatial Coverage:
N:
90
S:
30.98
E:
180
W:
-180
N:
-39.23
S:
-90
E:
180
W:
-180
Strengths and Limitations

Strengths

Limitations

  • Low spatial resolution (25 km gridded) limits detail on concentration and precision of sea ice edge; is unsuitable for operational/navigational support (Cavalieri et al., 1999)
  • Underestimates sea ice concentration during melt season (Kern et al., 2020) and/or when the ice is thin (Ivanova et al., 2015)
  • Higher uncertainties in Antarctica due to flooded snow and other ice characteristics (Comiso et al., 1997)
  • Algorithm coefficients are fixed for a given sensor, so biases can occur if characteristic surface conditions change (Cavalieri et al., 1999)
  • False coastal ice can occur due to mixed land and ocean within a sensor footprint (Cavalieri et al., 1999)
  • Near-real-time product with no planned reprocessing for long-term consistency; should not be used to derive long-term trends in sea ice or snow (Cavalieri et al., 1999)

 

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Getting started

NSIDC currently archives passive microwave sea ice concentration products based on two algorithms: the NASA Team algorithm and the Bootstrap algorithm. Both algorithms were developed by researchers at the NASA Goddard Space Flight Center in the 1980s.

How To

Many NSIDC DAAC data sets can be accessed using the NSIDC DAAC's Data Access Tool. This tool provides the ability to search and filter data with spatial and temporal constraints using a map-based interface.